/**
 * Particleground
 * banner效果点线插件
 * @author Jonathan Nicol - @mrjnicol
 * @version 1.0.1
 * @description Creates a canvas based particle system background
 *
 * Inspired by:
 * http://requestlab.fr/
 * http://disruptivebydesign.com/
 *
 * @license The MIT License (MIT)
 *
 * Copyright (c) 2014 Jonathan Nicol - @mrjnicol
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
! function(a) {
  function b(b, d) {
      function e() {
          if (w) {
              $canvas = a('<canvas class="pg-canvas"></canvas>'), v.prepend($canvas), p = $canvas[0], q = p.getContext("2d"), f();
              for (var b = Math.round(p.width * p.height / d.density), c = 0; b > c; c++) {
                  var e = new l;
                  e.setStackPos(c), x.push(e)
              }
              a(window).on("resize", function() {
                  h()
              }), a(document).on("mousemove", function(a) {
                  y = a.pageX, z = a.pageY
              }), B && !A && window.addEventListener("deviceorientation", function() {
                  D = Math.min(Math.max(-event.beta, -30), 30), C = Math.min(Math.max(-event.gamma, -30), 30)
              }, !0), g(), o("onInit")
          }
      }

      function f() {
          p.width = v.width(), p.height = v.height(), q.fillStyle = d.dotColor, q.strokeStyle = d.lineColor, q.lineWidth = d.lineWidth
      }

      function g() {
          if (w) {
              s = a(window).width(), t = a(window).height(), q.clearRect(0, 0, p.width, p.height);
              for (var b = 0; b < x.length; b++) x[b].updatePosition();
              for (var b = 0; b < x.length; b++) x[b].draw();
              E || (r = requestAnimationFrame(g))
          }
      }

      function h() {
          for (f(), i = x.length - 1; i >= 0; i--)(x[i].position.x > v.width() || x[i].position.y > v.height()) && x.splice(i, 1);
          var a = Math.round(p.width * p.height / d.density);
          if (a > x.length)
              for (; a > x.length;) {
                  var b = new l;
                  x.push(b)
              } else a < x.length && x.splice(a);
          for (i = x.length - 1; i >= 0; i--) x[i].setStackPos(i)
      }

      function j() {
          E = !0
      }

      function k() {
          E = !1, g()
      }

      function l() {
          switch (this.stackPos, this.active = !0, this.layer = Math.ceil(3 * Math.random()), this.parallaxOffsetX = 0, this.parallaxOffsetY = 0, this.position = {
              x: Math.ceil(Math.random() * p.width),
              y: Math.ceil(Math.random() * p.height)
          }, this.speed = {}, d.directionX) {
              case "left":
                  this.speed.x = +(-d.maxSpeedX + Math.random() * d.maxSpeedX - d.minSpeedX).toFixed(2);
                  break;
              case "right":
                  this.speed.x = +(Math.random() * d.maxSpeedX + d.minSpeedX).toFixed(2);
                  break;
              default:
                  this.speed.x = +(-d.maxSpeedX / 2 + Math.random() * d.maxSpeedX).toFixed(2), this.speed.x += this.speed.x > 0 ? d.minSpeedX : -d.minSpeedX
          }
          switch (d.directionY) {
              case "up":
                  this.speed.y = +(-d.maxSpeedY + Math.random() * d.maxSpeedY - d.minSpeedY).toFixed(2);
                  break;
              case "down":
                  this.speed.y = +(Math.random() * d.maxSpeedY + d.minSpeedY).toFixed(2);
                  break;
              default:
                  this.speed.y = +(-d.maxSpeedY / 2 + Math.random() * d.maxSpeedY).toFixed(2), this.speed.x += this.speed.y > 0 ? d.minSpeedY : -d.minSpeedY
          }
      }

      function m(a, b) {
          return b ? void(d[a] = b) : d[a]
      }

      function n() {
          v.find(".pg-canvas").remove(), o("onDestroy"), v.removeData("plugin_" + c)
      }

      function o(a) {
          void 0 !== d[a] && d[a].call(u)
      }
      var p, q, r, s, t, u = b,
          v = a(b),
          w = !!document.createElement("canvas").getContext,
          x = [],
          y = 0,
          z = 0,
          A = !navigator.userAgent.match(/(iPhone|iPod|iPad|Android|BlackBerry|BB10|mobi|tablet|opera mini|nexus 7)/i),
          B = !!window.DeviceOrientationEvent,
          C = 0,
          D = 0,
          E = !1;
      return d = a.extend({}, a.fn[c].defaults, d), l.prototype.draw = function() {
          q.beginPath(), q.arc(this.position.x + this.parallaxOffsetX, this.position.y + this.parallaxOffsetY, d.particleRadius / 2, 0, 2 * Math.PI, !0), q.closePath(), q.fill(), q.beginPath();
          for (var a = x.length - 1; a > this.stackPos; a--) {
              var b = x[a],
                  c = this.position.x - b.position.x,
                  e = this.position.y - b.position.y,
                  f = Math.sqrt(c * c + e * e).toFixed(2);
              f < d.proximity && (q.moveTo(this.position.x + this.parallaxOffsetX, this.position.y + this.parallaxOffsetY), d.curvedLines ? q.quadraticCurveTo(Math.max(b.position.x, b.position.x), Math.min(b.position.y, b.position.y), b.position.x + b.parallaxOffsetX, b.position.y + b.parallaxOffsetY) : q.lineTo(b.position.x + b.parallaxOffsetX, b.position.y + b.parallaxOffsetY))
          }
          q.stroke(), q.closePath()
      }, l.prototype.updatePosition = function() {
          if (d.parallax) {
              if (B && !A) {
                  var a = (s - 0) / 60;
                  pointerX = (C - -30) * a + 0;
                  var b = (t - 0) / 60;
                  pointerY = (D - -30) * b + 0
              } else pointerX = y, pointerY = z;
              this.parallaxTargX = (pointerX - s / 2) / (d.parallaxMultiplier * this.layer), this.parallaxOffsetX += (this.parallaxTargX - this.parallaxOffsetX) / 10, this.parallaxTargY = (pointerY - t / 2) / (d.parallaxMultiplier * this.layer), this.parallaxOffsetY += (this.parallaxTargY - this.parallaxOffsetY) / 10
          }
          switch (d.directionX) {
              case "left":
                  this.position.x + this.speed.x + this.parallaxOffsetX < 0 && (this.position.x = v.width() - this.parallaxOffsetX);
                  break;
              case "right":
                  this.position.x + this.speed.x + this.parallaxOffsetX > v.width() && (this.position.x = 0 - this.parallaxOffsetX);
                  break;
              default:
                  (this.position.x + this.speed.x + this.parallaxOffsetX > v.width() || this.position.x + this.speed.x + this.parallaxOffsetX < 0) && (this.speed.x = -this.speed.x)
          }
          switch (d.directionY) {
              case "up":
                  this.position.y + this.speed.y + this.parallaxOffsetY < 0 && (this.position.y = v.height() - this.parallaxOffsetY);
                  break;
              case "down":
                  this.position.y + this.speed.y + this.parallaxOffsetY > v.height() && (this.position.y = 0 - this.parallaxOffsetY);
                  break;
              default:
                  (this.position.y + this.speed.y + this.parallaxOffsetY > v.height() || this.position.y + this.speed.y + this.parallaxOffsetY < 0) && (this.speed.y = -this.speed.y)
          }
          this.position.x += this.speed.x, this.position.y += this.speed.y
      }, l.prototype.setStackPos = function(a) {
          this.stackPos = a
      }, e(), {
          option: m,
          destroy: n,
          start: k,
          pause: j
      }
  }
  var c = "particleground";
  a.fn[c] = function(d) {
      if ("string" == typeof arguments[0]) {
          var e, f = arguments[0],
              g = Array.prototype.slice.call(arguments, 1);
          return this.each(function() {
              a.data(this, "plugin_" + c) && "function" == typeof a.data(this, "plugin_" + c)[f] && (e = a.data(this, "plugin_" + c)[f].apply(this, g))
          }), void 0 !== e ? e : this
      }
      return "object" != typeof d && d ? void 0 : this.each(function() {
          a.data(this, "plugin_" + c) || a.data(this, "plugin_" + c, new b(this, d))
      })
  }, a.fn[c].defaults = {
      minSpeedX: .1,
      maxSpeedX: .7,
      minSpeedY: .1,
      maxSpeedY: .7,
      directionX: "center",
      directionY: "center",
      density: 1e4,
      dotColor: "#666666",
      lineColor: "#666666",
      particleRadius: 7,
      lineWidth: 1,
      curvedLines: !1,
      proximity: 100,
      parallax: !0,
      parallaxMultiplier: 5,
      onInit: function() {},
      onDestroy: function() {}
  }
}(jQuery),
/**
* requestAnimationFrame polyfill by Erik M枚ller. fixes from Paul Irish and Tino Zijdel
* @see: http://paulirish.com/2011/requestanimationframe-for-smart-animating/
* @see: http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating
* @license: MIT license
*/
function() {
  for (var a = 0, b = ["ms", "moz", "webkit", "o"], c = 0; c < b.length && !window.requestAnimationFrame; ++c) window.requestAnimationFrame = window[b[c] + "RequestAnimationFrame"], window.cancelAnimationFrame = window[b[c] + "CancelAnimationFrame"] || window[b[c] + "CancelRequestAnimationFrame"];
  window.requestAnimationFrame || (window.requestAnimationFrame = function(b) {
      var c = (new Date).getTime(),
          d = Math.max(0, 16 - (c - a)),
          e = window.setTimeout(function() {
              b(c + d)
          }, d);
      return a = c + d, e
  }), window.cancelAnimationFrame || (window.cancelAnimationFrame = function(a) {
      clearTimeout(a)
  })
}();